Ball-mill



` F. E. MARCY.

BALL MILL.

APPLICATION FILED MAR. l0. 1919. 1,362,834.

'Patented Dec. 14,1920.

' 3 SHEETS-SHEET l.

ATTORNEY.

V F. E. MARCY.

BALL MILL.. APFLiCATIoH HLED MAR.10.19|9.

Patented Dec. 14,1920.

3 SHEETS-SHEET 2.

ATTORNEY F. E. MARCY. .n i .BALLwMlLL' APPLICATION FILED MAR.10,`19I9. 133602,334.

'3 SHEETS-SHEET 3.

TTORNE X mama 1160.14, 1920. l

. hereof.

FRANK E. MARGY, or s Arfr LAKE CITY, UTAH.

Toallthomtmayeoneem:"1j\f""" l i* Be :it-fknowngthat I-,EFRANK' ..Mimon a; l citizen of theUnited'States', residing' at Salt. Lake City,A lin'gthe 4countyl of lSalt' Lake and and. useful Improvements finfBallMillg 'of :tot description, reference". being hed filoV the..y

4 55 ing= thepositionei''he wellds` ,15 the sheet liner for the head and litters.; Fig.-

provements hereinhoweverfposssing .eerf tain structurall advantages not'presentinft y Lpresentto lgs 1 to llnclu'sive;

the patented machines," *Among the'` novely features possessing these adv'aritztgesmay be mentioned the grate sectionsfformed. by the' Welding of the terminals of'thegratebalsy the peripheral slots formed the wallsof' thel drum for the insertion ofthe several' grate sections ;A the speciafl `sheet lliners lfor details the' 'advantages' of? whichl 'will be fully apparentv from the .following detiiled `jde'- scription iti connection -witlj` the af'cco'mpanyinf]r drawings'in' which' i.

end elevtion' lof a.` f

mill showing one form" :o-fimyg'improyedtgrate, viewed trom thef'eed endftheA scoop,.-

feeder being leut offend part of. the feed head broken away Fig. .2V is a side elevation 40 of' the mill with parts in ``longitudinel.secl tion; Fig; 32- is en enlarged vertical cross#- section on-the'line 3 3 of"Fig. 2 showing a' portion .ofthe frate `and ldischarge l head tov which lthe same is secured, and@ portioniof 'r 4 is an enlarged planro'f tlieportionof the .periphery ofthe drum in which.` theslotfis formed-"for receiving theI Section5 portionofthe cover plate f'rlthe slot'heing removed gleIig. @is a plan of the center grate section hrokenv et. the middle "Figl' A6` is n. plnv oftwo-.bars welded ftogetherfat their' endsg'Fg. 7 is an enlarged'longjtudinl.see-1 al :tional detail onfthe'flinfe 7-7 of Ffigr.v @show-f; between the termi-'nels ioftwo barsFig. 8 is e, .dross-sec-j,

' ',BALLLMILL.

specifiegtipp'fSpetters Paten' e011. the die@ sef 1 3 -rom the lCenterv lof .the middle 'the bars heing o-eqtialf length being disposelbn theidia'meter of the 'grate Fig. l'O- jis a'. cross-.sectional detail onthe line stood in thelnrt... *us5 the Vinner face FICE.4

at that: point, `l

3 showing `one the' forms of sheet.heeld2-linerfor:supporting the grate; A65

grate eom'posed' of ia; -seriespofgrate,sectors 'drum lot ext lSents thefouter shell yof thedIuL-*ortumorling 'barrel thelinertherei seid drum .belng provldedxwithafeed"head-3 andi-a dlschajrge headfl, vsaid heads beingfformed" lifters '7 against p risingl r4alseriesof.rolled grate bars 8 providedwith spacing-lugsor pads-theends of the harsibeingr. welded. together `.on the 1002" sides nl ollle;y theirouter emmers, ,that to the @"oririers.` y 7 1 .against whi, 'whihiit 'is' in in.'largeIneasurefsupported?x The welds. welfejclerly. indioa'tedin Figs. 1.05 A5 to'8 inelusive.l `lnthisitypelo hairs'y welded together. atwthe: ends so I*es .to E g formefplullitv 'of sections, so far-es 1 `aware'.fis? new, tnv, object "of .looatln-g-Zjthe 1 10'1 Fim-13 isn eross-sectionaldetail on the line-70 'V weldsiat the outer or lower comers efthef barsfbeing-Lthntthe grate heist a. tendency to Y sheet liner over the inner radial grate-sup-- to admit the full widtlrof the widestsec tion, the side sections being insertedfirst and then pushed to one side, then the intermediate sections .are inserted and pushed against the side sections, and finally the middle section is inserted, the last section fitting snugly between the intermediate sections and remaining directly under the-.slot O; The latteriis then covered by a( curved or arcuate plate l() ofl T -shapedcrosssection, the body 4of the plate entering the slot and the flanges of the plate overlapping the walls of the slot, the terminals of the flanged portion being bolted to the wallof the drum.

The grate thus built up is then fastened.

rigidly in position by the screw-boltsll disposedcircularly about the periphery of the drum the same as shown in my Patent No. 1,153,239 aforesaid. Since the slot oripening O is disposed in the plane ot' disposition of the grate, all that is necessary wheir a grate isto be placed into the mill, is to drop the grate sections through the slot (the drum being' previously turned to bring the slot on top), push the sideand intermediate sections to on side and the center or middle section into place, clamp do'wn the coverv plate 1() and the job is finished. In the same way worn-out grate sections or a worn-out grate may be removed through the slot (l.

'film-installation of' a grate may illus be.

made in a minimum amount of time and with little effort or exlnnditure of'y energy.

, 1nl my present' improvement l provide the discharge head and its radial litters with a sheet metal liner, the same being composed of a series ot' radial sections or sectors 12 di'sposed, along the inner i'ac'e of' the head l then bent up (inward) at the sides to engage the sides of the litters 7. one ol' the sides ot' the linerl beine' folded or brought u 1 over h a ethe inner radial edge of the lifter. the opposite sido stopping Hush willi the radial edge of the adjacent lifter (Fig. 10)` the fold ofE one liner section covering the radial edge oi a lifter ovcrhanging said edge sulliciently to overlap the edge ot the upturned side of the next liner section terminating flush 'with the edge of the litter. The folding of the ortin(r edc'e of the lifter is not necesa-ai p l, H

4in all eases. and in Fig. l1 is showna modified form of liner composed of vsections 12 'eral slot 0 the radial edges of whose upturned o1' inturned sides all terminate flush with the radial edges of the litters. In both forms the liner sections are secured to the lifters by pins or pegs L as shown. The present mill is'provided with a conventional form ot' scoop feeder 13, the drive 14 being on the feed endof the mill. l i i The grate or screen need not necessarilyv be composed of sections which are segmental 1n form, but may be` built of sections in thevtorm of sectors a as shown in-tlieV mod1f1cation l1n F 12 and 13.k In that case the individual grate bars 15 and pads 16 are of rolled metal and likewise welded at their ends, the welds w being on the side ol the bar and at the lower orouter corners thereof, that is to say, the corners adjacent the litters? which support the gate. In this modification the concave surface to which the grate wears down is indicated by the curved dotted line lr in Fig. 13, it being apparent that the welded corners will be permanently ont etrange ofI action of the attrition bodies tending to disintegrate the grate, whereby the grate sector will remain asa unit until discarded. llvhere a grate is-composed oi' sectors n. the peripheral, slot 0 an not be availed oi to advantage and in that case the grate sectors are installed either before the two sections of the outer shell of' the drinn are assembled (the shell 1 being usually in twoseclions), or they may be man-hole where the mill otherwise has been assembled. ll'here a grate composed of inserted through a suitable sectors a. is employed. the sectors are se- `cured to the litters by bolts 1T passed through the clamping bars lo inserted between the beveled radial meeting edges of' `face of 1he head l and to theli'liters 7. It"

desired however, the sheets 12 may be eX- tended to cover said ledge 19 and it, would be fully within thi,` spirit o'l nl v invention to do this.

llihere a 'grate is huilt up of a pluralit)V o'tscgmeutssuch as a. a short peripheral .slot of a length sufficient to allow a .segment to he passed into the mill answers the purpose. i There may be instances-however where it might be desirable to employ a one-piece grate 2O as shown in the' modification illustrated in Figs.` lvl and y15. In that event resort would be had to a periph'- extending around circumferentially `full)v one-half the periphery of' the shell, a corresponding semi-circular cover.

`stalling a plate l0 being availed of alter the lgrate was dropped into position. There a onepiece grate-is desirable, the 'semi-circular slot O through 'which the grate canbe directly dropped into position is most ideal,"

and scarcely any time need be lost in iugrate of this hind through such an openlng.

Ina-llV the forms of inill here considered the grate component oi the mill is supported by the lifter-s 7, and held against rotary displacement by the screw-bolts ll which clamp the several sections together and 'ro saving'of time and labor.

the mill.

the shell, the grate being 'further guardai on the side facingthe crushing rempartA meut by the adjacentend oi. the wall liner' 2. The use of, a periphei. l slot or opening disposed in the plane o disposition oi the grate7 through which the grate or sections thereoi:l may be droppenA into position with out moving the saine ont ot said plane is a decided advantage, tending lo economy 'and The one-piero grate shown'in Figs. i4 and 'l5 is only by Way of example, and other forms of grate may be employed. For instance, aone unit grate might be lformed of Welded hare such v as shown in Figs. l to 3 and Fig. By

Welding together the outside bars of t-lie several sect-ions a. of the first 'forni ot' grate above-described, We could obtain a one unito grate which would he a `full equivalent or' the one and 15.

The essential component parts ot a mill of the type here described are the drum (shell l and Wall liner 2),- the feed and discharge heads, and the grate, the absence ot' during the rotation of the mill about'its.

axis, the fine particles passing through the screen or grate andentering 1the radial corn-v `pertinents between thel litters 7. The

crushed material is conductdthrough the -discharge trunnion 6o, whenee, as av rule, it

is conductedto a suitable'classier which returns the coarsersands `back to the mill Vfor regrinding, the fines being subjected to whatever treatment may be necessary for the recovery ofthe metall'my'.K othervalues .f Features piece grate shown iny Figs. i

vhown butnot alludedsto herein are Well understood in the art and require no description in the present connection.

Having described' my invention what I claim is:

l. ln a mill-of the character described', a

'crushing compartznentya frate comprising u plurality of rolled bars spaced apart forining one or' the walls ol said compartment,

suitable attrition bodies iu the crushing compartnient1 'the bars being Welded to one another at the onda at points beyond the range ci action' of the attrition bodies.

2. ln a mill of the rhaii v f ibeds a cru/Shing compa rien .posed of spaced bars and foi-mini f` the walls ot' said compartment, a support for the gratol "ou'the side facing away from the crushing compartment the ends Vof the bars being welded together at onlyY yone side yol" each andr` at al pointadjarent the grate,support.A

2%. rln a mill of the character described, a crushing compartment, attritionbodies vin said compartment, a grate composed of a plurality otsections each comprising a series oi rolled metal. hars provided W'th spacing pads. a suppe 1` the grate on the Side opposite fromkv t Jfacing the crushing compartment, the ends of the bars being welded only at the cornr" oi the bars on the yside of the grate a. cent the grate support whereby the welds are permanently out of the range ot 'action of the attrition bodies.

i. In a niill of the character described, a drum, a screen grate disposed across the rotation axisthereof, thereheng a. peripheral slot in thewall of the drum dlspoSed in the planal of disposition'of-l'he grate for the insertion of the grate into the mill.

In va rnill of the character described, a

discharge head provided with radial litters,

and a sheet metal liner bent 4to cover the inner face o the head and the sidesand radial edges of the litters.

6. In a mill of the character desc1'ibed,-a 105 discharge head provided with radial litters land a sheet liner comprisingr a series `o radial sections each covering an area of the inner face of the headbounded b twolifters, .and bent to bounding littersl .acing said aree, one of the bends being broughtover the radial edge 4of the lifter and projecting ls'znlliciently beyond it -to overlap thehedge ofthe upturned .side of the next sueeeedingfliner section. .11,5f

- In testimon whereofxl aixnry signature, in presenceo twowltneeseszfai-J FRANKE. f VVitinsseszu'A l f i i* VIOLA DRUsHAL,

C. 'l'.t CUNDIGK.

rotect the `s i es ofthe 110, 

